package com.community.windy.controller.interceptors;

import com.community.windy.config.SecurityConfig;
import com.community.windy.entity.LoginTicket;
import com.community.windy.entity.User;
import com.community.windy.service.UserService;
import com.community.windy.util.CookieUtil;
import com.community.windy.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;

@Component
public class LoginTicketInterceptor implements HandlerInterceptor {

    @Autowired
    private UserService userService;
    @Autowired
    private HostHolder hostHolder;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //Cookie中获取凭证
        String ticket = CookieUtil.getValue(request,"ticket");
        if (ticket!=null){
            //查询凭证
           LoginTicket loginTicket = userService.findLoginTicket(ticket);
           //检查凭证是否过期
           if (loginTicket!=null&&loginTicket.getStatus()==0&&loginTicket.getExpired().after(new Date())){
               User user = userService.findUserById(loginTicket.getUserId());
               //在本次请求中持有用户
               hostHolder.setUser(user);
               //构建用户认证的结果，并存入SecurityContext，以便于Security进行授权
               Authentication authentication = new UsernamePasswordAuthenticationToken(
                       user,user.getPassword(),userService.getAuthority(user.getId())
               );
               SecurityContextHolder.setContext(new SecurityContextImpl(authentication));
           }
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        User user = hostHolder.getUser();
        if (user!=null&&modelAndView!=null){
            modelAndView.addObject("loginUser",user);
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        hostHolder.clear();
        SecurityContextHolder.clearContext();
    }
}
